Device for correcting parameters of laser radiator, particularly for leveling applications in building industry and method for its manufacture and adjustment

摘要

The present invention relates to a device for correcting parameters of a laser radiator consisting of a body (6) having a cylindrical hole in the longitudinal axis of which there are slidably mounted two cylindrical casings (2) with laser radiators (3) disposed therein opposite to each an other. The casing (2) faces are provided with removable front holders (4) serving for securing correction converging lenses (5) with extremely great focal distance and with a central hole (14) having its center in the longitudinal axis of the casings (2) wherein said central hole (14) diameter (d) equals to or is smaller than one half of the laser radiator (3) beam (1) diameter (D). The thickness (t) of the lenses (5) at the place of circular edge of the central hole (14) corresponds to one of thicknesses where trajectory difference caused by different speed of light propagation within air medium of the central hole (14) and in optical medium of the lens (5) material equals or nears to one half of a light wavelength emitted by the laser radiator (3). Adjustment and production of the device is characterized in that a distance is determined at which an optimal pattern of a laser radiator (3) beam (1) is required. Subsequently, correction converging lenses (3) selected from a group of lenses (5) with gradually increasing thickness are successively put to the laser radiator (3) and influence thereof to the beam (1) pattern (13) in the determined distance is monitored. According to the determined nearest lower thickness to the thickness of the expected optimal pattern (13), a lens (5) blank or a disk of a plane-parallel plate of clear plastic is selected and successively polished. In such a manner, optical thickness of a lens (5) increases and compares with thickness corresponding to the expected optimal pattern (13). After the final lens (5) thickness is achieved, an axial central hole (14) is performed therein.